well, there is another way to lock VPN traffic for laws, specifically, for websites to do it.
most of the time, when you sign up for a service, you either will not use a #vpn traffic, or do. not a problem, though, because for some, say, Google, services, they have a permission to completely bypass VPN services on your phone, unless it's just apple.
this means your identity which was on your real IP can be tied back to your VPN IP.
this level of VPN coordination can allow that company to say "ok, this is a VPN IP clearly, let's block it."
then, they can violate your #privacy and, in many ways, #cybersecurity .

plus, they don't exactly protect you if they have your real identity already.

in fact, i'm sure #clownflare will also find ways to censor VPN IPs as well, given their track record.
so from a company standpoint, yes, this is absolutely enforceable.
not so much as from a state government standpoint, and, to an extent, even a US government standpoint. I say, to an extent, because keep in mind the US built #tor so I don't think even they want to ban VPNs themselves.